When I transfer music to my HTC One M7 it says unable to play this type of audio files?

[AC Question]

When I transfer music to my HTC One m7 it says "unable to play this type of audio files"

I have an HTC One m7 smartphone and when I try to transfer my music files it shows a message " unable to play this type of audio file". I have had no problems with my LGe460 so is this a phone issue? Any help would be appreciated.